Julian Lewis: May I just say to my hon. Friend in her role as Chairman of the Liaison Committee that she was enormously helpful to the Defence Committee—as were other members of the Committee—in getting the  senior official to agree to come, and in getting the Prime Minister to agree to attend the Defence Committee? In the end, it was a very valuable session. I do not know Mr Cummings, but I support his cause, and he is in danger of doing grave damage to the cause that he and  I both support because the effect of his refusal is far more damaging than anything that could happen at a hearing if he actually gave evidence. Finally, may I appeal to her to stop using the word “backstop”, which, at the moment, is not my favourite expression?